drm/amd/display: Fix incorrect comment

Fix incorrect comment about hardware capabilities debugfs interface.
Reviewed-by: Jerry Zuo <jerry.zuo@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c

@@ -3606,8 +3606,7 @@ DEFINE_DEBUGFS_ATTRIBUTE(disable_hpd_ops, disable_hpd_get,
 			 disable_hpd_set, "%llu\n");
 
 /*
- * Returns 1 if hardware supports MALL cache
- * 0 otherwise.
+ * Prints hardware capabilities. These are used for IGT testing.
  */
 static int capabilities_show(struct seq_file *m, void *unused)
 {